Grab-bucket.



E. E. BROSIUS.

GRAB BUCKET.

APPLICATION FILED JAN.3 1, 1914 Patented Dec. 8, 1914.

2 8HEETBSHEBT 1.

WITNESSES THE NORRIS PETERS CO PHOTO-LITHO WASHING VON, 0 C

E. E. BROSIUS. GRAB BUCKET. APPLICATION FILED JAN. 31,1914

Patented Dec. 8,1914.

2 SHEETS-SHEET 2.

mxu (m 3 WW O/W "HE NORRIS PETERS Cu, PHOTO-Linda, WASHING roN, n L

EDGARE. BROSIUS, or PITTSBURGH,-PENNSYLVANIA.

GRAB-BUCKET.

Specification of Letters Patent.

Patented Dec. 8,

1 i 0 Application filed January 31, 1914. Serial No. 815,663.

'2 and 3 are detail views showing the locking hook'mechanism in different positions; Fig. at is a side elevation showing the bucket closed; Fig. 5 is an end elevation ofthe bucket; Fig. 6 is a detail view showing the hook and cooperating parts in another-position; and Fig. '7 is a detail plan view of one of the parts. Fig. 8 is a detail view of another one of the parts.

My invention has relation to grab buckets of the clam-shell single-linetype. 1

' The object of the present invention is to provide automatic locking devices for use in connection with a bucket of this general character which will be simple and-positive in their construction and operation.

The nature of my invention will be best understood by reference to the accompanying drawings, in which is illustrated the preferred embodiment thereof andwhich will now be described, it being premised, however, that various changes can be made in the details of construction and arrangement of the parts, without departing from" the spirit and scope of my invention as definedin the appended claims. 1 9

In 'thesedrawings, the numerals 2 and 3 designate the two bucket sections having the brackets 4 at their upper inner corner portions,w hich are pivoted on the central shaft 5. Pivotally connected'to the upper ou'ter'corner portions of the bucket section 3Tare the frame members 6, whose upper'end portions are bent horizontally, as indicated at 7, and the extremities of these bent portions being connected to the upper outer corner portions of the bucket section 2 bygthe links 8. The bucket as thus far describedis'similarto the bucket described in my Patent No. 1,087,105, dated June 30,1914. l i

The numeral 9 designates a cross head eration of the bucket.

which, in the present case, is permanently connected at 10 to the center shaft 5.;"Journaled on this cross head are two sheaves or pulleys 11, around which pass the end portions of the hoisting cable 12, the ends of said cable .being fixed to the frame at13.

The horizontal portions-7 of theframemembers 6carry a frame 14:, having at its central portion the upwardly projecting lugs or ears'l5.. 16. is a hook of T-shape which is pivoted at 17 between thelugs or ears 15, and has theprojecting weight armlS at the opposite side ofthe pivot from its hook. The hook is formed onits under side with one looking recess 19 andwith a second locking recess 20 at the opposite side of its center. Pivoted to the arm of the hookwhich is adjacent-to the recess 20 is a gravity latch 21, which is free to swing outwardly to the position inclicated in Fig. 2, but which is'prevented from swinging inwardly beyond the position shown in Figs. 4c and 6 by means of a shoulder 22 on the hook arm. 1 i

23 is a transverse pin orshaft which is carried bymembers 2t, secured to the two parts of the hoisting cable 12. In order to permit these members 24: to wind upon the drum 25 of thencrane 26, which carries the bucket, each ofsaid members may be formed in two sections pivotally connected by the pin or shaft 23.

27 isa chain or other suitable suspension member attached at its upper end to the crane 26, and carrying at its lower end a U- shaped'm'ember 28, see Fig. '8, This member 28 is suspendedina fixed positionfromthe crane with respect to vertical movement and in position to c06peratewith' the hook 16 in themanner hereinafter described. The hook of the member28 is also preferably provided with a horizontally projecting loop 29 (shown in detail in ,Fig. 7 and through which the hoisting *cable' and the 1 members 2% are adapted topassin the op- The operation is as follows: Assuming the parts to be in the position shown in Fig'il, in which the bucket sections are open and arereadygto be lowered on tothe 'pileof material, the cable 12 has been hoisted toia position in which the pin or shaft 23 engaged withthe recess 1 90f the book 16, thus locking the bucket sections in their open position. The bucket 'isnow lowered ing with such pile, the slacking ofthe cable '12 releases shaft or pin 23 from the hook which immediately causes the weighted arm 18 of the hook 16 to swing said hook to the position shown in Fig. 2, allowing the bucket sections to close and take their load in'the usual manner. when the bucket has been closed and loaded and raised to a position for dumping, the hook 16 is in the position shown in Fig. 3, having been raised to a point where its upper edge is about to contact withfthe transverse lower end of the U- shaped member 28; as the bucket is further raised, the lower end of the member '28 rides downwardly around the .end of the hook 16 and incontact with the weighted arm.18 and when the bucket .is lowered engages with the recess 20. WVhen this engagement occurs, the bucket is suspended on the member 28 (in the manner shown in Fig.4) and can be dumped by continuing to lower the cable 12. In dumping the bucket, the cable is lowered until the cross head'9 hasmoved downwardly from the position shown in Fig. 4: to the position shown in Fig. 1. During this movement, the pin 23 in going down with the cable engages the left-.hand-arm of the hook in the manner shown in dotted lines in Fig. 6, and passes around the nose of the hook and when the cable is tion.

pended at affixed height fromthe crane.

raised engages the hook, thus actuating said hook to lower its Weighted arm 18 and free the opposite hook from engagement with the member 28, as shown in Fig.1. The gravity latch 21, being then substantially in the position shown in Fig. 1, prevents the re,- engagement of the member 28 with the hook. The parts are now again in the position shown in-Fig. 1, ready for the next opera- It will be noted that the function of the hook in one of its operative positions is tohold the bucket sections open, and that its function inthe other of its operative positions is to veifec'tf a, suspension for the bucket to enable itto' open by the weight of its load by slacking the cable. In the first of these positions, the hook cooperates with the pin or shaft 23, carried by the'hoisting H cable, and in the second of these-positions, it cooperates with the member 28,-wh1ch is sus- These operations are wholly automatic in character inthat they require no special trip connections which must be actuated by the operator. The-unlocking of the bucket sec-f tions in their open position is effected automatically by the contact of the sections with the-pilev of material without the use of any special trip paddles or other similar devices.

Such devices have'been found to be uncertain'in their operation, owing to the difl 'er-v entfangles at whichthe bucket contacts with the surfaceof the'materi'al and are further operations.

It will be understood that I do not desire to limit myself to the use of my invention in connection with the particular construction of bucket which I have herein shown and described, inasmuch as it can be applied to other buckets.

Iclaim:

1. The combinationwith agrab bucket of the clam-shell single-.linetype having pivoted bucket sections, of a locking member ing two hook portions located, respectively, at opposite'sides of its pivot, means for normally biasing said member in a predetermined position, and, means arranged to cooperate with one of said hook portions-to pivoted to the frame of the bucket and havlock the bucket sections in open. position i and to cooperatewith the other of said hook portions to support the bucket while being dumped, substantially as described.

'2. The combinationwith a grab bucketof the clam-shell single-line type having pivoted bucket sections, of a locking member pivoted to the frame of the bucket and having two'hook portions located, respectively, atopposite sides of its pivot, a relatively fixed member: supported independently of the bucket and arranged to cooperate with one'of said hook portions to support the bucket whilebeing dumped, and means for cooperating with the other of said hook portions .to hold the bucket sections in open position, substantially as described. 3. The combination with agrab bucket of the clam-shell single-line type having pivoted bucket sections, of 'a'locking member pivoted to the frame of the bucket and having two hook portions located, respectively, at opposite I sides of its pivot, a relatively fixed member supported independently of the bucket and arranged to cooperate with one of said hook portions to support the bucket while being dumped, and means for cooperating with the other of said hook portions to hold the bucket sections in open position, the last named meansbeing carried by the-single line of the bucket, substantially as described.

1. A grab bucket of the clam-shell, singlelinetypehaving pivoted bucket sections, of a member pivoted to the frame of the bucket and'having two hooks located, respectively, at opposite sides of its pivot,'counterweighting means whereby said member normally assumes 9. predetermined position, and a relatively fixed member supported inde: pendently of the-bucket and arrangedto cooperate with one of said. hook portions to support the'bucket while being dumped, to-

bucket to cooperate with the other hook portion and hold the bucket sections open, substantially as described.

5. In a grab-bucket of the clam shell single-line type, the combination with a frame and bucket sections pivoted to said frame, of a T-hook also pivoted to said frame, and having hook portions at opposite sides of its center and also having a portion which acts to normally hold said members in a predetermined position, together with means arranged to cooperate with said hook in one position thereof to lock the bucket sections in open position, and to cooperate with the hook in another position thereof to support the bucket while dumping; substantially as described.

6. A grab-bucket of the clam shell singleline type, having a frame, bucket sections pivoted to the frame, and a hook also pivoted to the frame, said hook being provided with looking recesses at opposite sides of its vertical center and also having a weighted arm projecting to one side of its center, one of said recesses having a pivoted guard, together with means arranged to cooperate with said hook in one position thereof to lock the bucket sections in open position, and to cooperate with the hook in another position thereof to support the bucket while dumping; substantially as described.

In testimony whereof, I have hereunto set my hand.

EDGAR E. BROSIUS.

Witnesses:

G120. B. BLEMING, GEO. H. PARMELEE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents,

Washington, D. 0. 

